This Filter writes the data associated with each Feature to a file name specified by the user in CSV format. Every array in the Feature map is written as a column of data in the CSV file. The user can choose to also write the neighbor data. Neighbor data are data arrays that are associated with the neighbors of a Feature, such as: list of neighbors, list of misorientations, list of shared surface areas, etc. These blocks of info are written after the scalar data arrays. Since the number of neighbors is variable for each Feature, the data is written as follows (for each Feature): Id, number of neighbors, value1, value2,...valueN.